Shock-absorber.



' lJ. c.v BECK.

SHOCK ABSOBBEB.

PPLIOATIOII PVILED 00T. 17, im.

Patented Sept 15, 1908.

a saura-ann l. A

J. G. BECK.

811001; Asomam. APPLICATION FILED 001'. 17, 1901. l

Patented sepa 15,1908.

' direction indicated by the arrows.

Aan additional modification, shown in section.

y'Unia-112D --STATES- PATENT OFFICE..-

JOHN c. BECK, or sYcAiioRE, ILLINOIS, assioma or oNaHiLr "ro CHARLES TURNER l I el. To allwhom it may concern:

Be it known that I, Joim C. BECK, a citizen of f ie United States, and a resident of Sycamore, in the county of Dekalb and State oi' Illinois, lm ve invented certain new and useful Improvements in Shock-Absorbers, of

which the following, when taken in conneo tion `with the. drawings accompanying and forming n part hereof, is a full and complete description, sufficient to enable those skilled in the art to which it pertains to understand, make, and use` the saine.

This l invention relates to devices principally used on automobiles to lessen the shock occasioned b the vehicle moving over an uneven road r over obstacles in a road, such devices being own to-the art as shock absorbets.

The object of his invention is to obtain a shock absorber which will not restrict the resiliency of the springs of the automobile to which the device 1s attached and which can be easily adjusted when used on automobiles of varyingr weight.

A further object of the invention is to obtain a shock absorber which will be effective ip o eration, simple in construction and not liab e ,to get out of order.

In the drawin referred' to Fivurel is a vertical sectiona view of a shoclli absorber embodying this invention. Fig. 2 is an ele- 'vation of a portion of a shock absorber with a portion of the cylindrical 'wall thereof broken away to exposeY to view the movable parts of the device, which are shown in elevation. Fig. 3 is a vertical sectional view of a portion of the cylindrical wall of the device, showi the movable arts thereof in elevation. 4 is a vertical section of a modi fication o the apparatus. Fig. 5 is a vertical section of a portion of the cylindrical wall of the modification, and Fig. 6 is a horizontal section on line 6-6 of Fig. 5, viewed in the Fig. 7 is A reference letter applied to designate a given art is used to indicate such part throng out the several figures of the drawings wherever the same appears.

.A is a cylindrical casing.

B is the removable end of casing A and is attached to such casing .by means of internal screw threads corresponding with and fitting over the screw threads a, (seeFi l).

a is a lug on the bottom of casing A such SHOCK-ABVSOBBER.

Specification. Letten; Patent. f .-f ppiiciaa'ii' ma omaggi-1, ism. sama. afi-1,772.

BROWN, 0F CHICAGO. ILLINOIS.

mienten sept. 15,. feos.

es 'izrovided with boia a" ihren i; g

which' t secured in a suitable-collar or.

bracket on the axle of avehicle may passed..

This end B is provided with the hexagonal" portion C to which a wrench may be fitted to tum such end firmly to its place. The Aend B is also provided with the stuffing box.D hav-'Eng the gland d and packin d. hexagonal end of the stuffing. x D.

E ns a longitudinally movable stem pro.- vided at its lpwer end with the piston F and at its upper end with the adjustable eye bolt G. Eye bolt G is provided with aperture g throfngli .which a bolt secured in a suitable brsefset'on the body of a vehicle-may be passed. The eye bolt G; is provided with scremthreads y fitting intoe'orresponding screws' threads e in stem E to permit a variationi'm length of stem E, to the end that the piston F ma be substantially midway betwee-n the en s of the cylinder when the automob-:le is not moving. The adjustment of the efe bolt G may be such that the piston F will stand substantially midwa between the ends of the cylinder A when t e automobile is ner in motion with a`given load in the auto mob-le, or without a load, as preferred.

gf" is a lock nut by means of which the ad'imsiment of the eye bolt G is maintained.

piston F is provided with the annular chamber H and the vertical passage wa a h, 1i, cuimniunicating with the ortion o the cyiiziderbelow the piston a with such annulsr chamber. Such piston is also r0- Vvideil with the passage way h communicating, v:when open, with theportionof the cylinderA above the piston I is a disk movably mounted on t`lpart J of the piston F. The movement'of e disk I is limited by screws or bolts K, auch bolts being' secured in the piston F andsuch disk disk L is in the position illustrated in Figs. 2 and. 3 of the drawings, respectively, the as sagel away h is closed by such disk an air When the' i A is a longitudinally cannot flow from one end of the cylinder A to the other end thereof. When the stem E and the piston F are moving down the disk I is in substantially the position illustrated in Fig. '3 of the' drawings and when such stem and piston are moving upwardlv the disk I is in substantially the position illustrated in Fig. 3. of the drawings,`(rela'tive to the pis-' ton F). When the d irection of motion of' the stem E and Vpiston F changes andthe disk I chances from the position shown in one of the Figs. .2 and 3 to the other of the positions shown in such figures, such disk moveson part J of the piston over or through the position thereof illustrated in Fig. 1 ofthe drawings, and at such time, and at no other time, communication is effected between thc ends of the cylinder A.

)I is a spring ring on piston F and M is a spring ring on disk I. I have constructed t ie piston F of two parts f and f', attached tovether by the screws f. The part-j is provided with a hub, in which hub the stem E is secured, asby the screw threads e on such stem fitting into corresponding screw threads in such hub1 (see Fig. 1). The movable parts of the device may be oiled by oil introduced through oil cup N. To introduce such oil the cover Vn is removed.

In the modification illustrated in Figs. 4, 5-and 6 the cylinder A' and end B form the casing of the device. Cylinder A is provided with internal screw threads and end B is providedwit h correspondinexternal threads.

mova le cylinder, open at its ends, contained within the cylinder'A'. b', b', are seats irovided for the. ends of the cylinder A". ne of the seats b is on the end B and the other is adjacent to'tlie bottom of cylinder A. h", 1L, are ypassage ways near the ends of the cylinder A', communicat ing respectively with the paage Way H. Passage ways h, Il, are alternately closed ilizpon a change of movement of the piston at whatever position or place in such cylinder such piston is at the time of the change in motion, b the cylindar A being seated, by the ends coming into contact with the seats b', b. In this modification the dist-ance the c linder A may move is about three times t e diameter of one of the (passage ways h". To insure easy longitu lnal movement of the cylinder A I provide ribs af, a, 'on the inside of cylinder A', (see Figs. 4 and 6). Passage ways H' h h are closed by the plugs O, O'.

n t e modification illustrated in Fig. 7 the cylindrical casing A' is retained, provided with the assage ways H', h", 7i, stem E and piston 'and cover B' are also retained. The passage ways h", 7i" are continued beyond the inner walls of the cylinder, and are closed at their respective ends. The passage Wa s h, 7L" are also in this construction provi ed with the conical recessed Vto fit closely in the recesses openings p, which are alternately closed by the ro P, which is carried by the piston F. The ends of the rod P are cone shaped, p to insure closing of the saine. A- close ut siding lit of the rod P is made in the'kpiston F', so

that as soon as the change o direction of movement of the piston is made, in the operation of the device,and the passage wa h at one end of cylinder A has,(by suc change of movement) been opened and the passage way h at the other end has been closed, continued movement of the piston will not cause further movement of the rod P.

In the modification illustrated in Figs. 4, 5, 6 and 7 the plugs O, Ofor any one thereof, may bc omitted in which case atmospheric pressure of air will at all times exist, (or l nearly so) behind the piston, and upon change of direction of movement of such piston such air will be held and put under com; pression by the returning piston.

.In'all the constructions shown the piston is moved a greater or less distance 1n the cylinder by the oscillation or play of the springs of the vehicle being greater or less according -to the character ofthe road wa over which the vehicle is moving; and Ain al the constructions whenever zthe change ofmovement of the piston is eiected, at suchv time communication is effected between vthe chambers in. front and in rear of the piston, and immediately thereafter such'communication is closed, to remain closed so long as the piston continues to move in such given direction.

The operation ofV this av paratus is ,-i' When, by a movement-of t e piston in 'al given direction the communication between the ends of the cylinder is closed., the. air in frontof the iston is compressed until the movement o the piston ceases. 'When such piston begins to move in the opposite direction, (because of the resiliency of the springs of the vehicle and the greater pressure on the forward side of the piston) the passage way from endto end of t e cylinder 1s closed, until the direction of movement of such piston is again reversed.

In the construction illustrated in Figs 1 2 and 3 the passage way from one end of the c linder is through the iston, and the c osin thereof is effected by the disk I not following the revee movement of the iston until the relative position of such dis and piston changes, as hereinbefore described,

and by such change of relative position the ton, (in the casing), and the closing thereof' is effected by the piston, immediately upon the movement thereof being reversed, carryiisg 'l Cylindrical chamber,

ing the closing nt the eiid-of its movement by the air so compressed by it.

Having thus described my invention, what I claim is new and desire to secure by Letters Patent of the United States is,

l. The combination of a casing provided with a cylindrical chamber. a piston in the chamber, a stem to the piston, such ste-inextending through one of the end walls of the means to adjust the length of the iiston stein and to maintain it at an adjusted length, a passage way through the piston, a disk on t ie piston, such disk movable relative to the 'p iston, and such disk provided with a passage way therethrough, and such disk and piston arranged so that upon a change Aof direction of movement of the piston a corresponding change in relative position of the disk and piston will be effected and the passage way through the piston will thereby be o ened and again closed; substantially as t escribed.

2. The combination of a casing provided with a cylindrical chamber, a piston in the chamber, a stem to the piston, such stem extending through one of the end walls of the cylindrical chamber, means .to vary Y'the length of the stein and to maintain it at a determined length, a iassave way one end whereof opens into t e cylindrical chamber on one side of the piston and the other end whereof opens into such chamber on the other sidev of the piston, means actuated by the piston at the beginning of the movement of such piston in a given direction to open the passage way and sage wa cb the continuation of such move ment o t e piston; substantially as ieto again close such passcribed.

3. The combination of a cylinder provided with an end integral therewith and with screw threads adjacent to the open edge thereof, a removable end to the cylinder provided with screw threads corres ionding with the screw threads on the cylin er, a stuling box on such end, a piston arranged to obtain chambers in the cylinder, a piston stem extending through the stulling bers provided with a communicating passage way, means to open such iassage way on t e change of movement of tlie iston from one direction 'to the opposite direction and to close such passage way on the continued movement of the piston.

4. The combination of a cylinder closed at its ends a iston arranged to obtain a chainber on eac i side thereo within such cylinder, a stem to the piston, such stein extendin through one of the ends of the cylinder, suc

chambers provided with a passage way by means of which communication may be e box, such chainfected between 'the chambers, means to open such passage way on the change of movement of the piston from one direction to the opposite direction and to close such passage way on the continued move-ment of the pis ton in thc new direction, a stulling box to the stem and means to vary the length of the stem and to maintain it at a determined length; substantially as described.

its ends, a piston arranged to obtain a chamber on each side thereof within such cylinder, a stem to the piston, such `stem extendin through one of the ends of the cylinder, suc- 5. The combination of a cylinder-closed at chambers provided with a communicating passage way, means to open such passage way on the change of movement of the piston from one direction to the opposite direction and to close such passage way on the continued movement of the iston.

OHN C. BECK. 'In presence of ALEXANDER Rmrrinz` Jona A. Bow-raiz. 

